The most recent Speaking of Faith program addresses the question of the relationship between paganism and environmentalism. This hour-long program is worth listening to.
Here are a couple other resources you may want to check out:
MPR recently explored the relationship between environmentalism and religion in Minnesota’s faith community. Find more information on this issue here.
I just stumbled across this collection of information on Gary Snyder, whom we'll be reading later in the semester. You can listen to an interview with Snyder or hear him read his poems here.